Influential holistic analyses of patient perspectives assume that the concepts that patients associate with medical terms are formed by their total social and cultural contexts. Holistic analyses presuppose conceptual role semantics in the sense that they imply that a medical term must have the same role for a nurse and a patient in order for them to associate the same concept with the term. In recent philosophy of mind, social externalism has emerged as a non‐holistic alternative to conceptual role theories. (...) According to social externalism, a nurse and a patient express the same concept by a term if they both have a minimal or better understanding of the term. Three arguments in favour of social externalism are presented in connection with nurse–patient interaction. The first concerns successful communication, the second focuses on belief reports made by patients and the third centres on the need for including medical terms in medical discourse. Finally, the practical implications of the arguments are clarified. The most important of these is that, in cases of misunderstanding, a nurse should not conform to a patient's idiosyncratic understanding, but instead correct the mistaken applications of the term in question. (shrink)